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| Criterion |  Operations Kepner-Tregoe |  Operations Fishbone Diagram |  UX Design Service Blueprinting |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | For a disturbance that's hard to pin down, the method cleanly separates problem, cause, and decision. It reduces mixing when symptoms allow several interpretations. | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | When a service experience is spread across several touchpoints, it brings frontstage and backstage together. It shows where user contact and internal responsibility must fit. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | High | Low | High | Low |
Timedifferent | 2-8 h | 30-60 min | 0.5-2 Tage | 15-30 min |
Participantsdifferent | 2-8 | 2-8 | 6-12 | 2-6 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop |
Outputdifferent | Problem Analysis, Decision Analysis, Risk Plan | Fishbone Diagram, Cause Categories, Investigation Backlog | Service Blueprint, Fail Points, Ownership Map | Root cause notes, Countermeasures |
Tagsno overlap | Problem solvingRoot causeDecisionOperations | Root causeQualityOperations | Service designOperationsJourneyBlueprint | Root causeIncidentLeanProblem solving |